Originally Posted by Jim Baldwin
Great display too bad they don't have an old plunger line switch to demo.


They do. Here you go:
[Linked Image from lh3.googleusercontent.com]
[Linked Image from lh6.googleusercontent.com]
Card says Sumner Tunnel Authority, 300 Group, East Boston, Plunger Line Switch, Automatic Electric
[Linked Image from lh4.googleusercontent.com]
[Linked Image from lh6.googleusercontent.com]